CN103246297A - Automatic establishing method for effect body concentration in vacuum salt production - Google Patents
Automatic establishing method for effect body concentration in vacuum salt production Download PDFInfo
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- CN103246297A CN103246297A CN201310174778XA CN201310174778A CN103246297A CN 103246297 A CN103246297 A CN 103246297A CN 201310174778X A CN201310174778X A CN 201310174778XA CN 201310174778 A CN201310174778 A CN 201310174778A CN 103246297 A CN103246297 A CN 103246297A
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Abstract
The invention discloses an automatic establishing method for effect body concentration in vacuum salt production, which can realize on-line building and automatic controlling of the differences of the solution supersaturation in different effect bodies without increasing additional devices through considering that solution supersaturation which affects the crystallization process, and aims to solve the defect of vacuum salt production industry in granularity controlling. According to the method provided by the invention, on-line measuring for the effect body concentration without additional devices is realized; and the calculation for optimal concentration value of the effect body crystallization according to the changing of external environment of the effect body and automatic control of all processes provide faster crystallization process, more uniform granularity, lower labor cost, reduced manual operation error, and improved efficiency.
Description
Technical field
The present invention relates to a kind of vacuum process, in particular, the present invention is that a kind of vacuum salt production is imitated the automatic method for building up of bulk concentration, belongs to the salt industry field.
Background technology
The granularity of salt is as one of important indicator of weighing the salt quality, and the size of its granularity and homogeneity directly have influence on quality, performance and the selling price of product.Big and the uniform product of particle mean size easily filters, and the dry run energy consumption is low, and salt matter is higher.The tendency that the big and uniform product of while granularity lumps in the process of storing or transporting is little, even caking phenomenon has taken place, because the unit contact point is few, caking is also easy to be broken.Yet employed flow process and device structure are to improve product yield and the angle that cuts down the consumption of energy and designing under many circumstances in China salt manufacturing is produced, and the granularity that how crystalline environment preferably is provided and how controls product is considered seldom.Especially at multi-effect evaporation system, granularity technology how to control product is rare especially.
Solution crystallization is that solute is separated out the process that forms crystal from solution, and the output of crystallization process depends on the solubleness of crystalline material.When the concentration of solution equals the solubleness of solute just, be called saturated solution; When solution contains above the solutes content of solubleness, then be called supersaturated solution.Solutes content surpasses the part of saturated solution and represents with degree of supersaturation.Degree of supersaturation is the main expulsive force of crystallization process.In crystallization process, the degree of supersaturation of solution has a significant impact crystallization process, and it is determining various process that crystallization process takes place and the speed of various process thereof, thereby directly has influence on granularity and the size-grade distribution of product.
Confirm that according to lot of experiments there are particular kind of relationship in degree of supersaturation and the crystallization of solution.Solubility curve and cross solubility curve with solution concentration-hygrogram be divided into the stable region, steady district and three zones, range of instability are situated between.In the stable region, solution does not reach capacity, thereby does not have the possibility of crystallization.In the steady district that is situated between, generation nucleus that can be not spontaneous, but if add crystal seed, these crystal seeds will be grown up.In unstable region, the generation nucleus that solution can be spontaneous more gos deep into the range of instability, and the nucleus of spontaneous generation is also many.Therefore in the industrial crystallization process, the degree of supersaturation of control solution is the key parameter of crystallization control process.The industrial crystallization process has only control as far as possible in the steady district that is situated between, and just can avoid spontaneous nucleation, obtains the big crystalline product of particle mean size.
Present stage, mode commonly used was exactly that online test instrumentation is installed at the scene, and on-the-spot actual concentration is measured, and determined respectively to imitate the concentration range of operation of body then according to operations staff's experience.So not only increase investment, and determined and controlled all to be manually-operated owing to imitate bulk concentration, thereby had very big personal error, significantly increased labour intensity.
Summary of the invention
The present invention is intended to solve the defective of vacuum salt production industry aspect granularity control, mainly start with from the solution degree of supersaturation that influences crystallization process, need not to increase under the prerequisite of extras, realize that the solution degree of supersaturation in online foundation and the control automatically of the otherness of difference effect body, namely provides a kind of vacuum salt production to imitate the automatic method for building up of bulk concentration.
The objective of the invention is to be achieved through the following technical solutions.
Inlet amount F, input concentration X
0, finish liquid concentration X
mAs the input variable of pretreatment module 1, after treatment, output is imitated the input of body actual concentrations estimator as each, and each is imitated body actual concentrations estimator and is calculated as follows and obtains each school body actual concentrations value
Be that i is imitated body actual concentrations value, m is the effect body number of this salt producing craft.
According to temperature T
i, pressure P
iIn conjunction with solubleness manual analysis value corresponding tables, after handling by pretreatment module 2, output is imitated the input of body aimed concn analyzer as each, and each is imitated body aimed concn analyzer and calculates and respectively imitate body aimed concn value.
Each imitates the output of body aimed concn analyzer as the setting value of PID controller, and each imitates the output of body actual concentrations estimator as the measured value of controller, controls by the PID controller, and output is as the input of span of control limit of control divider; Each imitates body fluid position setting value and actual measured value as the input of imitating body fluid position decoupling controller, adopts pid control algorithm to control; Imitate the decoupling controller output of body fluid position and regulate the purpose of imitating bulk concentration with span of control limit of control divider output stack acting in conjunction in imitating body feed supplement valve and imitate body punishment in advance valve, reaching.
The present invention has the following advantages: the present invention can save expenses such as equipment purchasing need not can to realize imitating the on-line measurement of bulk concentration under the prerequisite of additional equipment; Can calculate and imitate the required optimum concentration value of body crystallization by imitating the variation of external boundary environment, make crystallization process more quick, granularity is more even; Can realize the automatic control of all processes, reduce labour cost, reduce the manually-operated error, improve efficient.
Description of drawings
Accompanying drawing 1 is solution concentration-temperature synoptic diagram.
Accompanying drawing 2 is set up FB(flow block) automatically for vacuum salt production m effect bulk concentration.
Embodiment
Certain vacuum salt making facility adopts the quadruple effect concurrent, imitates bulk concentration foundation to two below and carries out following explanation.
Inlet amount F is 100 Kg/ hours, input concentration X
0Be 24 Kg/m
3, finish liquid concentration X
mBe 20 Kg/m
3, their signal is handled the back as the input of imitating the bulk concentration estimator by pretreatment module 1, be 22.9 Kg/m by calculating two effect body actual concentrations
3Two imitate body temperature degree T
iBe 110 ℃, pressure P
iBe 0.4 Mpa, again in conjunction with solubleness manual analysis value corresponding tables, calculating two effect body aimed concns by effect body aimed concn analyzer is 23.5 Kg/m
3, after controller 2 computings, output is as the input of span of control limit of control divider, controller 2 adopts pid algorithm to control, wherein ratio P span is 100～120, and integral time, the I span was 150～200, and derivative time, the D span was 10～20; The output of controller 2 is given and is imitated body feed supplement valve FV by behind the span of control limit of control divider
2Numerical value be K
12, give and imitate body punishment in advance valve XV
2Numerical value be K
22
Two effect body fluid position setting values and actual measured value are as the input of imitating body fluid position decoupling controller, adopt pid control algorithm to control, wherein the ratio P span of master controller is 100～120, integral time, the I span was 150～200, derivative time, the D span was 10～20, submaster controller ratio P span is 150～200, and integral time, the I span was 200～250, and derivative time, the D span was 10～20; Imitate body fluid position decoupling controller and export to effect body feed supplement valve FV
2Numerical value be K
32, give and imitate body punishment in advance valve XV
2Numerical value be K
42
Finally, imitate body feed supplement valve FV
2With effect body punishment in advance valve XV
2For the output of span of control limit of control divider and the result of imitating the common stack of body fluid position decoupling controller output, make two to imitate the body actual concentrations to aimed concn 23.5 Kg/m
3Approach.
Claims (2)
1. a vacuum salt production is imitated the automatic method for building up of bulk concentration, it is characterized in that inlet amount, input concentration, finishes liquid concentration through after the pre-service, imitates body actual concentrations estimator and calculates effect body actual concentrations by each; After each imitates body temperature degree Ti, pressure P i and the pre-service of solubleness manual analysis value corresponding tables process, imitate body aimed concn estimator by each and calculate effect body aimed concn; Imitate the body aimed concn and imitate the body actual concentrations respectively as setting value and the measured value of controller, adopt pid algorithm to realize control.
2. imitate the automatic method for building up of bulk concentration according to the described a kind of vacuum salt production of claim 1, it is characterized in that imitating body fluid position setting value and actual measured value as the input of imitating body fluid position decoupling controller, adopt pid control algorithm to control; Imitate the decoupling controller output of body fluid position and superpose acting in conjunction in imitating body feed supplement valve and imitating body punishment in advance valve with the output of span of control limit of control divider, regulate imitating bulk concentration.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627356A (en) * | 2015-12-31 | 2016-06-01 | 北京和隆优化科技股份有限公司 | Combustion optimization control system of metallurgical gas boiler |
| CN109980300A (en) * | 2019-03-05 | 2019-07-05 | 深圳市豪鹏科技有限公司 | A kind of electrolyte and its preparation method and battery |
| CN110673664A (en) * | 2019-10-25 | 2020-01-10 | 北京和隆优化科技股份有限公司 | Optimized control method for liquid level of salt melting barrel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997013722A1 (en) * | 1995-10-11 | 1997-04-17 | Krebs & Co. Ag | Salt extraction process and device |
| CN101121548A (en) * | 2006-07-25 | 2008-02-13 | 蓝色海洋世界有限公司 | Method for extracting minerals with high purity from deep ocean water |
| US20090035180A1 (en) * | 2007-08-03 | 2009-02-05 | Zhaoyang Wan | Control system for industrial water system and method for its use |
| CN201545706U (en) * | 2009-10-29 | 2010-08-11 | 姜瑶智 | Device for preparing industrial salt through vacuum atomization heating method |
| JP2011515308A (en) * | 2008-02-22 | 2011-05-19 | ダウ グローバル テクノロジーズ リミティド ライアビリティ カンパニー | Method and apparatus for purifying a solid salt composition |
| CN202683065U (en) * | 2012-07-31 | 2013-01-23 | 浙江省电力公司电力科学研究院 | Blind zone detecting device applied to pH control process of desulphurization system |
-
2013
- 2013-05-13 CN CN201310174778XA patent/CN103246297A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997013722A1 (en) * | 1995-10-11 | 1997-04-17 | Krebs & Co. Ag | Salt extraction process and device |
| CN101121548A (en) * | 2006-07-25 | 2008-02-13 | 蓝色海洋世界有限公司 | Method for extracting minerals with high purity from deep ocean water |
| US20090035180A1 (en) * | 2007-08-03 | 2009-02-05 | Zhaoyang Wan | Control system for industrial water system and method for its use |
| JP2011515308A (en) * | 2008-02-22 | 2011-05-19 | ダウ グローバル テクノロジーズ リミティド ライアビリティ カンパニー | Method and apparatus for purifying a solid salt composition |
| CN201545706U (en) * | 2009-10-29 | 2010-08-11 | 姜瑶智 | Device for preparing industrial salt through vacuum atomization heating method |
| CN202683065U (en) * | 2012-07-31 | 2013-01-23 | 浙江省电力公司电力科学研究院 | Blind zone detecting device applied to pH control process of desulphurization system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627356A (en) * | 2015-12-31 | 2016-06-01 | 北京和隆优化科技股份有限公司 | Combustion optimization control system of metallurgical gas boiler |
| CN105627356B (en) * | 2015-12-31 | 2018-02-02 | 北京和隆优化科技股份有限公司 | A kind of metallurgical gas fired-boiler combustion control system |
| CN109980300A (en) * | 2019-03-05 | 2019-07-05 | 深圳市豪鹏科技有限公司 | A kind of electrolyte and its preparation method and battery |
| CN109980300B (en) * | 2019-03-05 | 2020-08-04 | 深圳市豪鹏科技有限公司 | Electrolyte, preparation method thereof and battery |
| CN110673664A (en) * | 2019-10-25 | 2020-01-10 | 北京和隆优化科技股份有限公司 | Optimized control method for liquid level of salt melting barrel |
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Application publication date: 20130814 |